com.twelvemonkeys.image
Class GraphicsUtil

java.lang.Object
  com.twelvemonkeys.image.GraphicsUtil

public final class GraphicsUtil
extends Object

GraphicsUtil

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/image/GraphicsUtil.java#1 $

Author:

Harald Kuhr, last modified by $Author: haku $

Constructor Summary

GraphicsUtil()

Method Summary

static void	enableAA(Graphics pGraphics) Enables anti-aliasing in the Graphics object.
static void	setAlpha(Graphics pGraphics, float pAlpha) Sets the alpha in the Graphics object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GraphicsUtil

public GraphicsUtil()

Method Detail

enableAA

public static void enableAA(Graphics pGraphics)

Enables anti-aliasing in the Graphics object.

Anti-aliasing is enabled by casting to Graphics2D and setting the rendering hint RenderingHints.KEY_ANTIALIASING to RenderingHints.VALUE_ANTIALIAS_ON.

Parameters:

pGraphics - the graphics object

Throws:

ClassCastException - if pGraphics is not an instance of Graphics2D.

See Also:

RenderingHints.KEY_ANTIALIASING

setAlpha

public static void setAlpha(Graphics pGraphics,
                            float pAlpha)

Sets the alpha in the Graphics object.

Alpha is set by casting to Graphics2D and setting the composite to the rule AlphaComposite.SRC_OVER multiplied by the given alpha.

Parameters:

pGraphics - the graphics object

pAlpha - the alpha level, alpha must be a floating point number in the inclusive range [0.0, 1.0].

Throws:

ClassCastException - if pGraphics is not an instance of Graphics2D.

See Also:

AlphaComposite.SRC_OVER, AlphaComposite.getInstance(int, float)